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contributor authorTran, The Hung
contributor authorChen, Lin
date accessioned2022-02-04T22:00:41Z
date available2022-02-04T22:00:41Z
date copyright8/28/2020 12:00:00 AM
date issued2020
identifier issn0098-2202
identifier othergtp_142_09_091012.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4274703
description abstractIn this study, ability of an optical-flow algorithm in extracting wake structure of axisymmetric model was investigated. The initial data for optical-flow processing were obtained in low-speed conditions by particle image velocimetry method. The Reynolds number based on the model diameter was around ReD = 1.97 × 104 in this study. Both the time-averaged and transient flow characteristics of near-wake flow were illustrated and examined by the optical-flow analysis method proposed. The processing results of optical-flow method showed good agreement with conventional cross-correlation methods. The ability of optical-flow method to extract flow fields was, thereby, confirmed for blunt-based flow at low-speed conditions. This study showed that the antisymmetric flow behavior of the near wake is the dominant type at low-speed conditions. Differing to traditional methods and cross-correlation results, the optical-flow results showed a frequency at around StD = 0.015 of the near wake for the first time, which is connected to vortex shedding behavior of the wake flow.
publisherThe American Society of Mechanical Engineers (ASME)
titleOptical-Flow Algorithm for Near-Wake Analysis of Axisymmetric Blunt-Based Body at Low-Speed Conditions
typeJournal Paper
journal volume142
journal issue11
journal titleJournal of Fluids Engineering
identifier doi10.1115/1.4048145
journal fristpage0111503-1
journal lastpage0111503-17
page17
treeJournal of Fluids Engineering:;2020:;volume( 142 ):;issue: 011
contenttypeFulltext


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